<template>
	<div>
		<!-- 面包屑导航 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }"
				>首页</el-breadcrumb-item
			>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary">添加角色</el-button>
				</el-col>
			</el-row>

			<!-- 角色列表区域 -->
			<el-table :data="roleList" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row
							:class="[
								'bdbottom',
								i1 === 0 ? 'bdtop' : '',
								'vcenter',
							]"
							v-for="(item1, i1) in scope.row.children"
							:key="item1.id"
						>
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag
									closable
									@close="
										removeRightById(scope.row, item1.id)
									"
									>{{ item1.authName }}</el-tag
								>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<el-row
									:class="[
										i2 === '0' ? '' : 'bdtop',
										'vcenter',
									]"
									v-for="(item2, i2) in item1.children"
									:key="item2.id"
								>
									<el-col :span="6">
										<el-tag
											type="success"
											closable
											@close="
												removeRightById(
													scope.row,
													item2.id
												)
											"
											>{{ item2.authName }}</el-tag
										>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag
											type="warning"
											v-for="item3 in item2.children"
											:key="item3.id"
											closable
											@close="
												removeRightById(
													scope.row,
													item3.id
												)
											"
										>
											{{ item3.authName }}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column
					label="角色名称"
					prop="roleName"
				></el-table-column>
				<el-table-column
					label="角色描述"
					prop="roleDesc"
				></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button
							size="mini"
							type="primary"
							icon="el-icon-edit"
							>编辑</el-button
						>
						<el-button
							size="mini"
							type="danger"
							icon="el-icon-delete"
							>删除</el-button
						>
						<el-button
							size="mini"
							type="warning"
							icon="el-icon-detting"
							@click="showSetRightDialog(scope.row)"
							>分配权限</el-button
						>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!-- 分配权限的对话框 -->
		<el-dialog
			title="分配权限"
			:visible.sync="setRightDialogVisible"
			width="50%"
			@close="setRightDialogClosed"
		>
			<!-- 树形控件 -->
			<el-tree
				:data="rightslist"
				:props="treeProps"
				show-checkbox
				node-key="id"
				default-expand-all
				:default-checked-keys="defKeys"
				ref="treeRef"
			>
			</el-tree>

			<span slot="footer" class="dialog-footer">
				<el-button @click="this.setRightDialogVisible = false">取消 </el-button>
				<el-button type="primary" @click="allotRights">确定 </el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
export default {
	data() {
		return {
			//所有角色列表数据
			roleList: [],
			//控制分配权限对话框的显示与隐藏
			setRightDialogVisible: false,
			//权限数据
			rightslist: [],
			//树形控件的绑定对象
			treeProps: {
				label: 'authName',
				children: 'children',
			},
			//默认选中的节点id数据
			defKeys: [],
			//即将分配权限的角色id
			roleId: [],
		}
	},
	created() {
		this.getRoleList()
	},
	methods: {
		//获取数据列表
		async getRoleList() {
			const { data: res } = await this.$http.get('roles')

			if (res.meta.status !== 200) {
				return this.$message.error('角色列表获取失败!')
			}
			this.roleList = res.data
			// console.log(res.data)
		},
		//根据id删除对应的权限
		async removeRightById(role, rightId) {
			//弹框提示用户是否要删除
			const confirmResult = await this.$confirm(
				'此操作将永久删除该文件，是否继续',
				'提示',
				{
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning',
				}
			).catch((err) => err)

			if (confirmResult !== 'confirm') {
				return this.$message.info('取消了删除')
			}

			const { data: res } = await this.$http.delete(
				`roles/${role.id}/rights/${rightId}`
			)

			if (res.meta.status !== 200) {
				return this.$message.error('删除权限失败! ')
			}
			// this.getRoleList() 会重新刷新页面
			// console.log(role)
			role.children = res.data
		},
		//展示分配权限的对话框
		async showSetRightDialog(role) {
			this.roleId = role.id
			//获取所有权限的数据
			const { data: res } = await this.$http.get('rights/tree')

			if (res.meta.status !== 200) {
				return this.$message.error('获取权限数据失败！')
			}
			//把获取到的权限数据保存到data中
			this.rightslist = res.data
			// console.log(this.rightslist)
			//弹框显示数据之 递归获取三级结点的id
			this.getLeafKeys(role, this.defKeys)

			//显示弹框
			this.setRightDialogVisible = true
		},
		//通过递归的形式，获取角色下所有的三级权限，并保存到defKeys 数组中
		getLeafKeys(node, arr) {
			//如果当前node节点不包含children属性，则是三级节点
			if (!node.children) {
				return arr.push(node.id)
			}

			node.children.forEach((item) => {
				this.getLeafKeys(item, arr)
			})
		},
		//关闭弹框删除数组
		setRightDialogClosed() {
			this.defkeys = []
		},
		//点击为角色分配权限
		async allotRights() {
			//获取选中的id
			const keys = [
				...this.$refs.treeRef.getCheckedKeys(),
				...this.$refs.treeRef.getHalfCheckedKeys(),
			]

			const idStr = keys.join(',')

			const { data: res } = await this.$http.post(
				`roles/${this.roleId}/rights`,
				{
					rids: idStr,
				}
			)

			if (res.meta.status !== 200) {
				return this.$message.error('分配权限失败!')
			}

			this.$message.success('分配权限成功!')
			this.getRoleList()
			this.setRightDialogVisible = false
		},
	},
}
</script>

<style lang="less" scoped>
.el-tag {
	margin: 7px;
}
.bdtop {
	border-top: 1px solid #eee;
}
.bdbottom {
	border-bottom: 1px solid #eee;
}
.vcenter {
	display: flex;
	align-items: center;
}
</style>